Niels georg sorensen



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, N. G. SRBNSTHIu DOOR CHECK.

l #MyW/Q0@ NAL umoanmm www UNITED STATES PATENT OFFICE.

NIELS GEORG SRENSEN, OF STOCKHOLM, SWEDEN.

DOOR-CHECK.

"SPECIFICATION forming part of Letters Patent No. 514,511, dated February 13, 1894.

Application led December 26, 1891- Serial No. 416,190. (No model.)

.To all whom it may concern:

Beit known that I, NIELs GEORG SEENSEN, a subject of the King of Sweden and Norway, residing at Blasiehollnstoog 11, Stockholm, Sweden, have invented certain new and useful Improvements in Devices for Retaining Doors or the Like in their Open Positions; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a catch for a door and particularly to the means for operating said catch.

In the drawings: Figure 1, is an edge View of part of the door partly broken away. Fig. 2, is a detail view of the ordinary bolt and the means for. operating the connections to the door catch.

In the drawings A2 is the door and A the stationary catch secured to the wall and adapted to engage the pawl A' (pivoted in the door) when the door is opened so as to hold it in its open position. Said pawl A is operated to release the door by the rod B having its lower end entering a curved slot BX in the tumbler B2 which is in the form of a bell crank lever, the upper arm B3 of which engages the lug B4 on the ordinary sliding bolt B5 said bolt being pressed by the spring B5. The knob spindle is shown at B6. By this arrangement the bell crank tumbler 0perates the lock when the knob is turned to the right. When turning to the left the bar 35 ment after the lower end of the rod B con- 4o vtacts with the l wer end of the slot.

I clain In combination, the ordinary bolt F of the door lock a door catch and operating rod therefor and the means for operating both 45 the bolt and the rod, consisting of a tumbler B in the form of a bell crank lever having its vertical arm engaging the bolt and its horizontal arm connected directly to the catch rod, said horizontal arxn being slotted to re- 5o ceive said rod, substantially as described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

NIELs eunonev soEENsEN.

Witnesses:

G. W. ERDMAN,

U. S. Consul. ERNST SvANevIsr. 

